diff --git a/config/bundles.php b/config/bundles.php
index 2b082c4f..1d85d61d 100644
--- a/config/bundles.php
+++ b/config/bundles.php
@@ -23,7 +23,6 @@ return [
     Symfony\Bundle\WebServerBundle\WebServerBundle::class => ['dev' => true, 'test' => true, 'local' => true],
     Symfony\WebpackEncoreBundle\WebpackEncoreBundle::class => ['all' => true],
     Symplify\ConsoleColorDiff\ConsoleColorDiffBundle::class => ['dev' => true, 'test' => true],
-    Symplify\ConsoleColorDiff\ConsoleColorDiffBundle::class => ['dev' => true, 'test' => true],
     Translation\Bundle\TranslationBundle::class => ['all' => true],
     Translation\PlatformAdapter\Loco\Bridge\Symfony\TranslationAdapterLocoBundle::class => ['dev' => true, 'local' => true],
 ];
diff --git a/config/services_test.yaml b/config/services_test.yaml
index 4e4a00e2..6f84f5cb 100644
--- a/config/services_test.yaml
+++ b/config/services_test.yaml
@@ -1,3 +1,7 @@
 services:
-  monolog.processor.request:
-    synthetic: true
+    _defaults:
+        autowire: true
+        autoconfigure: true
+
+    monolog.processor.request:
+        synthetic: true
\ No newline at end of file
diff --git a/src/Doctrine/TablePrefix.php b/src/Doctrine/TablePrefix.php
index c3cf28b4..41b56c60 100644
--- a/src/Doctrine/TablePrefix.php
+++ b/src/Doctrine/TablePrefix.php
@@ -19,7 +19,7 @@ class TablePrefix
 
     public function loadClassMetadata(LoadClassMetadataEventArgs $eventArgs): void
     {
-        if ($tablePrefix = $this->getTablePrefix($eventArgs->getEntityManager())) {
+        if ($tablePrefix = $this->getTablePrefix()) {
             $classMetadata = $eventArgs->getClassMetadata();
 
             if (! $classMetadata->isInheritanceTypeSingleTable()
diff --git a/src/Doctrine/TablePrefixTrait.php b/src/Doctrine/TablePrefixTrait.php
index a566e523..d4966a75 100644
--- a/src/Doctrine/TablePrefixTrait.php
+++ b/src/Doctrine/TablePrefixTrait.php
@@ -46,10 +46,14 @@ trait TablePrefixTrait
         return $this;
     }
 
-    protected function getTablePrefix(ObjectManager $manager)
+    /**
+     * Since we introduced `symfony/proxy-manager-bridge`, the keys in the tableprefix
+     * no longer match what the manager tells us it should be. For example, the
+     * given key was `0000000005ee10ad0000000043b453e3`, but in our reference
+     * table we had `0000000005ee10e90000000043b453e3`. We just return the first one, now
+     */
+    protected function getTablePrefix(): string
     {
-        $key = spl_object_hash($manager);
-
-        return $this->tablePrefixes[$key] ?? '';
+        return current($this->tablePrefixes) ?? '';
     }
 }
diff --git a/symfony.lock b/symfony.lock
index 39118fa1..d06552a5 100644
--- a/symfony.lock
+++ b/symfony.lock
@@ -894,6 +894,9 @@
     "symfony/property-info": {
         "version": "v4.4.4"
     },
+    "symfony/proxy-manager-bridge": {
+        "version": "v4.4.10"
+    },
     "symfony/routing": {
         "version": "4.2",
         "recipe": {